.tab {
    position: relative;
    width: 260px;
    height: 40px;
    margin: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;

    .left,
    .rig {
        width: 0;
        height: 0;
        border: 14px solid transparent;
        cursor: pointer;
    }

    .left {
        border-right-color: #b68ee1;
    }
    .rig {
        border-left-color: #b68ee1;
    }

    .inner {
        width: 130px;
        height: 30px;
        text-align: center;
        line-height: 30px;
        background-color: #b68ee1;
        border-radius: 6px;
        box-shadow: inset 0 0 2px #fff;
        letter-spacing: 3px;
        color: #fff;
        font-size: 18px;
    }

    .back {
        position: absolute;
        bottom: 2px;
        right: -95px;
        width: 72px;
        font-size: 12px;
        background-color: #b68ee1;
        color: #fff;
        border-radius: 2px;
        text-align: center;
        user-select: none;
        -webkit-user-select: none;
        cursor: pointer;
    }
}
